Update config.yml

Author: Gunasekar-K

.circleci/config.yml

@@ -44,7 +44,7 @@ deploy_steps: &deploy_steps
 jobs:
   UnitTests:
     docker:
-      - image: circleci/node:12.16.1
+      - image: cimg/node:12.22.12
       - image: circleci/postgres:9.6.2-alpine
         environment:
         - POSTGRES_USER: circle_test